cond-mat.mes-hall

Superballistic paradox in electron fluids: Evidence of tomographic transport

This paper resolves the paradox of superballistic conduction occurring at near-zero temperatures in electron fluids by demonstrating that treating electrons as fermions with tomographic dynamics—allowing only head-on collisions—rather than as classical particles, explains the phenomenon and its distinction from conventional fluid behavior.

Separating Intrinsic and Domain-Mediated Anomalous Hall Conductivity in Co$_3$Sn$_2$S$_2$ via Contact Engineering

This paper demonstrates that contact engineering in thick Co$_3$Sn$_2$S$_2$ crystals enables the separation of intrinsic momentum-space Berry-curvature contributions from domain-mediated and extrinsic effects in the anomalous Hall conductivity by utilizing depth-distributed current flow to isolate single-domain responses.

Long-range spatial extension of exciton states in van der Waals heterostructure

This study demonstrates that narrow photoluminescence lines in a MoSe$_2$/WSe$_2$ van der Waals heterostructure correspond to spatially indirect excitons localized in a moiré potential with weak disorder, exhibiting a macroscopic spatial extension of several micrometers that deviates from a random potential landscape.

Quantum geometric map of magnetotransport

This paper proposes a unified quantum geometric framework that maps magnetotransport phenomena—including the magnetononlinear Hall, planar Hall, and ordinary Hall effects—to specific quantum geometric quantities like the Zeeman quantum metric dipole and Berry curvature quadrupole, thereby revealing new mechanisms such as a step-like spin-induced planar Hall effect in topological insulators.

Prediction of room-temperature two-dimensional $π$-electron half-metallic ferrimagnets

This paper proposes a strategy to design a room-temperature, two-dimensional organic half-metallic ferrimagnet with fully compensated magnetic moments and a singular flat band, achieved by combining Aza-3-Triangulene and 2-Triangulene molecules in a honeycomb lattice to enable robust spintronic applications.

Hofstadter's Butterfly in AdS$_3$ Black Holes

This paper derives a gauge-covariant single-band lattice model on the non-rotating BTZ black hole background to demonstrate how the interplay between AdS curvature and horizon size governs the fragmentation of Hofstadter's butterfly and the suppression of magnetic and Aharonov-Bohm responses through near-horizon state localization.

Hydrodynamic Analog of the Klein Paradox: Vacuum Instability and Pair Production in a Linear Elastic Medium

This paper presents a hydrodynamic analog of the Klein Paradox using a linear elastic medium to demonstrate that vacuum instability and pair production arise from mechanical breakdown under supercritical stress, thereby offering a concrete pedagogical model for visualizing these quantum field theory phenomena.

Revealing the physical structure of the general quantum master equation

Long-range spin-polarized Josephson effect in ballistic S/F/S junctions with precessing magnetization

This paper presents a theory for ballistic S/F/S junctions with precessing magnetization, demonstrating that the resulting non-equilibrium distribution of Andreev bound states generates long-range equal-spin superconducting correlations and a non-sinusoidal Josephson current, enabling a fully polarized half-metal junction to switch from an insulating "off" state to a conducting "on" state.

Josephson phase shift and diode effect due to the inverse spin Hall effect

This paper theoretically demonstrates that a superconductor-normal metal-superconductor junction with inversion-symmetric spin-orbit coupling can exhibit a Josephson phase shift and a superconducting diode effect via the inverse spin Hall effect induced by a spatially inhomogeneous magnetic field, without requiring broken structural inversion symmetry.